Question

Two angles of a triangle measure 78º and
62º. Find the measure of the third angle.​

Answer 1

Answer:

Sum of all the angles of a triangle is of 180 °

78°+62°=140°

180°-140°=40°

Then the third angle is of 40°.

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Answer 2

Answer:

the measure of the third angle is 40°

Step-by-step explanation:

1angle+2angle+3angle=180°

78°+62°+3angle=180°....{sum of measure of angle is 180°}

170°+3angle=180°

3angle=180-170

3angle=40°